Drive-pipe holder



S. P. POWERS DRIVE PIPE HOLDER Feb 26 192%,

Filed May 14, 1923 rates sense, teat.

can 9. rownns, or woosrna, OHIO.

pawn-Mrs Eonnm.

Application filed ma 14, teas.v Serial no. eaaeso.

To all whom it may concern:

Its principal objects are, first to Be it known that I, SAMUEL P. Pownns, a citizen ofthe United States, residmg at Wooster, in the county of Wayne and State of Ohio, have invented a new and useful Drive-Pipe Holder, of which the following is a specification.

My invention relates to improvements .in drive pipe holders,such as are used for holdin pipe or casing while being pulled up or owered in a hole, as the case may be. rovide improved means for gripplng the plpe and for releasing the same while being pulled up or lowered; second, to prevent bending 0 the pipe or casing in gripping and supporting, the same; and, lastly, to afford means for simultaneously actuating the several slips in gripping the ipe .or casing, or for releasing the grip of t e' slips, and r ing them simultaneously from the pipe or casing, automatically, instead of liftmg and shifting them manually into desired position, as heretofore.

y invention consists of the novel combination and arrangement of parts for the accomplishment of said objects, as hereinafter set forth and stated in the appended claims.

It is illustrated by the accom anying drawing, in which similar letters an figures of reference indicatelike parts.

Referring thereto,.Fig. l is a perspective view of a pipe holder embodyi my invention, one side bein cut away for etter illustratlon of the medhanism; Fig. 2 is a longitudinal section of Fig. 1 on the dotted line 2-2, with the slips removed therefrom; Fig.

' 3 is a lan view of the slip shifting mechanism, etached; and Figs. 4 and 5 are views of the front'and rear sides of the slips, respectively, detached. In the drawings A is strong metal block having end extensions a a, which rest fiatwise upon supports 12 b, as shown in Fig. 2.

The block is provided with a tapered bore as its longitudinal center of a size sufiicient to admit the introduction of the several quarter circle slips C to position therein, as shown in Fig. 1-said slips being beveled on the outside to fit the slope of the'bore aforesaid, and their inner surfaces 7' are hollowed longitudinally to fit the pi e or casing, and are vertical to the base 0 the block A,,maki them wedge shaped, whereby the slips tighten upon the pipe or casin as they slide down the sloped surface 0 the bore of the block.

Moreover, the slips are corrugated crosswise on their inner surfaces, and are. made of hardened steel in order to effectually grip and hold the pipe or casing from falling down therethru while being pulled out of the hole'in the earth. 7

I am aware that blocks and slips of similar construction, and. operation have been heretofore used and such I do not broadly claim.

Heretofore the slips have been lifted and lowered into position by means of handles attached to their upper surfaces, and man ually shifted up and down in the lifting or lowering of the pipe without any adequate slips simultaneously, or of freeing the s 'ps t e operation of the slips. It is the principal fects, and I do so by. forming longitudinal corresponding dovetail rooves, as shown in means for shifting the several wedge shaped 1 from connection with the surface of pipe, resulting, frequently, in causing the pipe to become bent and injured by uneven ject of my invention to avoid these dedovetailed members D, D, D, D, which are fitted to reciprpcate freely up and down in Fig. 2, D; and the sips C are actuated slmultaneously by means of a circular plate B located below the block A, as shown in I F i 1, and movably secured thereto by bolts f assed thru the slots 6, so as to rotate free y a limited distance in either direction around the outer surfaces of the slips C, respectively. The slips each have a spiral groove 0 cut into them near the lower endthereof, and the circular plate B is further provided with inwardly projecting studs d, d, d, d, adapted to fit loosely within the spiral groove adjacent thereto. Removable bars 9, g, are provided to serve as handles or levers for rotating the plate B; one or both of the handles may be employed by inserting the ends thereof, respectwely, into the notches h.

It is ap arent that by turn the plate B, when t e several slips C are in position,

and the studs d are in operative enga ment with the respective spiral grooves 0, to said slips may be simultaneously elevated, and by means of the dovetail connections aforesaid, the slips are automatically separa from their grips on the pulled up pi or casing, when the handles 9 are moved inone direction, and when moved in the other di rection,-they are simultaneously drawn down over the beveled bore of the block A, thereby closing around the ipe and securely holding the same within t eenclosure of the slips with absolutely unyielding grip thereon, r v

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is- 1. In a device of the character described, the combination with a metal block having a beveled bore therein, and a plurality of dovetail grooves in the sides of the bore,

, of a series of slips or grip ing members of each slip, and a circular plate surr0und-' ing said assembled slips, and provided with studs projecting inwardly and adapted to travel in said spiral grooves respectively,

ineaeoe the combination with a metal block having a beveled bore, a plurality of dovetail grooves in the sides of the bore, a plurality of wedge shaped and circular slips adapted to reci rocate freely, vertically, Within the bore 0 the block, each of said slips having a dovetail tongue on its-outer surface, adapted to reciprocate freely within said dove tail grooves, respectively, a spiral groove in the. outersurface of each slip, and a circular plate surrounding said sli s assembled in said bore, and having stu s projecting'inwardly adapted to, travel in said spiral grooves, respectively, when the plateis rotated, substantially as set forth,

In witness whereof I hereunto set my hand this 9 day of May, 1923. p

SAMUEL r. POWERS. 

